Report: Hillary suffers lingering effects from injuries

1/25/13 1:09 PM EST

The New York Daily News examines close-up photos of Secretary of State Hillary Clinton and concludes she may be suffering lingering effects from her concussion and blood clot:

Clinton's spokesman confirmed Thursday night she is wearing ...special glasses as a result of the fall and concussion she suffered last month, but he did not elaborate.

Experts told the Daily News that Clinton likely has a Fresnel prism placed on her glasses. The adhesive panel is used to treat double vision.

“If she’s wearing a Fresnel prism, then she has double vision without it,” said Dr. Mark Fromer, medical director of Fromer Eye Centers... Fromer said the press-on prism, which can also be used to treat muscle weakness in the eye, “helps bring images into focus.”

The Daily News examined photos from her testimony Thursday and noticed tiny lines seemingly etched into her lens, a tell-tale sign of the Fresnel prism. Read the full Daily News report here.